Product Details
Product Description
Our Grade 10.9 half-thread hex bolts are made of carbon steel with yellow zinc plating for excellent corrosion resistance and strength.The half-thread design ensures better shear performance and precise load alignment, ideal for machinery assembly, construction, and equipment fastening. Available in sizes M6–M24, lengths up to 150 mm, and tensile strength up to 1040 MPa, meeting ISO 898-1 standards.As a China manufacturer, we offer OEM production and bulk supply with strict quality control, consistent coating, and reliable delivery trusted by industrial buyers worldwide.
Technical Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Standard | ISO 4014, DIN 933, ASTM A449 | Thread Type | Partial (Half Length), Metric Coarse Thread |
| Head Type | Hexagon Head | Property Class | Grade 10.9 (High Tensile) |
| Drive Type | Wrench/Socket (Metric Sizes) | Coating / Finish | Yellow Zinc Plated (Chromate Finish) |
| Material | Medium Carbon Alloy Steel, Quenched & Tempered | Tensile Strength | 1040 MPa (min) |
| Yield Strength | 940 MPa (min) | Corrosion Resistance | High (Salt Spray Test: 120+ hours to white rust) |
| Hardness | 32-39 HRC |
Product Size (Hot-Selling Models for Middle East, Central & Southeast Asia)
We stock a comprehensive range of sizes. Below are our best-selling partially threaded bolts for structural applications.
| Diameter (mm) | Diameter (Inch approx.) | Full Length (mm) | Thread Length (mm) | Common Length (Inch) |
|---|---|---|---|---|
| M12 | 1/2″ | 40 – 120 | 30 | 1-1/2″ – 4-3/4″ |
| M16 | 5/8″ | 50 – 150 | 35 | 2″ – 6″ |
| M20 | 3/4″ | 60 – 200 | 40 | 2-3/8″ – 8″ |
| M24 | 1″ | 80 – 240 | 50 | 3-1/8″ – 9-1/2″ |
| M30 | 1-1/4″ | 100 – 300 | 60 | 4″ – 12″ |
Note: The M16x60, M20x80, and M24x100 are our top sellers for structural connections. The thread length is typically calculated as 2.5d + 6mm (e.g., M20 thread length ~ 50mm). Custom dimensions and threading are available.
Application Scenarios
Our Grade 10.9 half-thread hex bolts are widely used in industrial and structural assembly projects requiring high tensile strength and reliable surface protection.
Key application areas include:
- Machinery Assembly: Securing heavy-duty components and machine frames.
- Construction Engineering: Ideal for steel structures and equipment foundations.
- Automotive Manufacturing: Used for chassis and suspension system assembly.
- Industrial Equipment Mounting: Ensures high torque retention and vibration resistance.
- Maintenance & Repair Operations: Suitable for OEM replacement parts and bolt upgrades.
Frequently Asked Questions (B2B-oriented)
A: Half-thread designs offer better shear strength and alignment for load-bearing joints, making them ideal for machinery and structural connections where precision and rigidity are required.
A: Yellow zinc plating provides excellent corrosion resistance and a distinctive visual finish, commonly preferred in machinery, automotive, and outdoor applications.
A: Yes. The Grade 10.9 carbon steel material ensures high tensile and yield strength, making them ideal for high-torque or heavy-load assemblies.
A: Yes. As a factory-direct supplier, we can produce customized half-thread bolts with specific shank lengths, thread pitch, and coating thickness to meet OEM specifications.
A: Our products comply with ISO 898-1 standards and undergo tensile, hardness, and coating thickness tests to ensure consistent mechanical performance and surface protection.